The 11th international conference on Direct Reactions with Exotic Beams (DREB2020) is part of the biennial series, which began in 1999 at MSU, East Lansing, at the initiative of physicists working in the field from MSU, IPN-Orsay, and FSU. The following meetings were held at Orsay (2001), Guildford (2003), East Lansing (2005), Wako (2007), Tallahassee (2009), Pisa (2012), Darmstadt (2014), Halifax (2016), and Matsue (2018). The scientific program is devoted to the latest experimental and theoretical research and developments in nuclear reactions with exotic nuclei. The topics will include the following subjects relevant to direct reactions:

• Nuclear astrophysics
• Spectroscopy of exotic nuclei, drip-line and unbound nuclei
• Nuclear force and Short-range correlations
• Advances in direct reaction theory
• New instrumentation for direct reaction studies
• Ab-initio methods for structure and reactions
• Clustering phenomena probed by nuclear reactions

I will describe geometries that give rise to a novel algebraic structure, the Exceptional Drinfeld Algebra, which has recently been proposed as an approach to study generalised U-dualities, similar to the non-Abelian and Poisson-Lie generalisations of T-duality. This algebra is generically not a Lie algebra but a Leibniz algebra, and can be realised in exceptional generalised geometry or exceptional field theory through a set of frame fields giving a generalised parallelisation. I will first introduce the essential algebraic ideas and then discuss some geometric examples. Based on arXiv:2006.12452 with D. Thompson and S. Zhidkova.

This seminar is part of a series of online seminars on 'integrability, dualities and deformations' organized by Durham University, Humboldt University and the IGFAE. The link to the zoom room, its password and additional information about the series can be found in intdualdef.

Four-dimensional Chern-Simons (4d CS) theory in the presence of surface defects was proposed by Costello and Yamazaki as a unifying framework for describing two-dimensional integrable field theories (2d IFTs). I will describe a new way of understanding the passage from 4d CS to 2d IFTs. Specifically, I will show that (a suitably regularised version of) the 4d CS action becomes gauge invariant if certain boundary conditions are imposed on the surface defects. Alternatively, the action can be made gauge invariant by coupling it to a new 2d field, the edge mode, localised on the surface defects. I will then explain how the edge mode perspective on 4d CS provides a direct link to 2d IFTs. The talk will be based on the joint work arXiv:2008.01829 with M. Benini and A. Schenkel.

This seminar is part of a series of online seminars on 'integrability, dualities and deformations' organized by Durham University, Humboldt University and the IGFAE. The link to the zoom room, its password and additional information about the series can be found in intdualdef.

Dear Colleagues:

It is our pleasure to invite you to the RD51 Collaboration Meeting and the topical workshop on “New Horizons in TPCs” which will take place from 5th to 9th of October 2020, hosted by the Galician Institute of High Energy Physics (IGFAE).

The meeting will be fully virtual and fee-free, however registration is mandatory. Without detriment to that, the possibility of on-site attendance will be re-evaluated by late August/early September.

Best Regards
Diego González-Díaz (conference chair)

El historiador barquense Ricardo Gurriarán participará en el tercer diálogo del ciclo organizado por el Instituto Galego de Física de Altas Enerxías (IGFAE) cuyo objetivo es explorar el binomio arte-ciencia con personalidades del ámbito cultural y artístico. Moderado por el investigador del IGFAE Cibrán Santamarina, podrá seguirse en directo el próximo jueves, 1 de octubre, a las 19:00 horas a través del canal de YouTube del IGFAE.

Se o Universo tivese 24 horas, a materia que compón todo o que nos rodea formouse en tan só os 3 primeiros minutos. Dende os quarks, gluóns e leptóns, as partículas máis elementais e únicas, ata a enorme diversidade das galaxias e cúmulos de galáxias, hai unha viaxe evolutiva de 13.800 millóns anos. O xoves 25 de xuño ás 16:00 (hora de Madrid), abriremos unha xanela ao ceo co investigador do IGFAE e profesor da Universidade de Santiago de Compostela (USC) Carlos Pajares na súa charla online “Os tres primeiros minutos do Universo” para escrutar a natureza máis íntima da materia.

"Universo peregrino: ciencia galega cara o mundo" é un ciclo de charlas divulgativas online organizado polo Instituto Galego de Física de Altas Enerxías (IGFAE) da Universidade de Santiago de Compostela (USC) para a comunidade galegofalante internacional. En momentos de illamento no que os peregrinos non poden vir a Santiago, a cidade Xacobea é a que reconstrúe as pontes e emprende a peregrinaxe cara ao mundo. Todos os xoves de maio e xuño de 2020, ás 16:00 (hora de Madrid), o persoal investigador do IGFAE dará unha charla sobre distintos temas de física que poden seguirse online na plataforma Microsoft Teams.

Podes seguila en directo facendo click aquí, ou acceder despois a través da canle de YouTube do IGFAE.

José "Pepe" Gordon, one of the most popular figures in scientific dissemination and culture in Mexico, will participate in the second dialogue of the talk series organized by the Galician Institute of High Energy Physics (IGFAE) whose objective is to explore the art-science binomial with personalities from the cultural and artistic fields. Moderated by IGFAE researcher José Edelstein, the chat will be broadcasted in Youtube next Monday, June 22, at 8:00 p.m. on the IGFAE YouTube channel

"Transfronteirizas, Conversas de Arte e Ciencia" is a cycle of virtual dialogues broadcast on YouTube in which figures from the cultural field are invited to explore the intersections between art and science with our research staff, seeking an interdisciplinary approach. This initiative is included into the ArtLAB program, which aims to build bridges and promote participation between society and the research community through different artistic expressions.

We study the influence of the baryon chemical potential ${\mu }_{\mathrm{B}}$ on the dynamical properties of the Quark–Gluon–Plasma (QGP) in and out-of equilibrium. The description of the QGP in equilibrium is based on the effective propagators and couplings from the Dynamical QuasiParticle Model (DQPM) that is matched to reproduce the equation-of-state of the partonic system above the deconfinement temperature $T_{\mathrm{c}}$ from lattice Quantum Chromodynamics (QCD).

We study the transport coefficients such as the ratio of the shear and bulk viscosities to the entropy density, i.e. $\eta /s$ and $\zeta /s$, the electric conductivity ${\sigma }_0/T$ as well as the baryon diffusion coefficient ${\kappa }_{\mathrm{B}}$ and compare to related approaches from the literature (non-conformal holographic model, lattice QCD, NJL). We find that the ratios $\eta /s$ and $\zeta /s$ as well as ${\sigma }_0/T$ are in accord with the results from lattice QCD at ${\mu }_{\mathrm{B}}$=0. Furthermore, there is only a very modest change of transport coefficients with the baryon chemical ${\mu }_{\mathrm{B}}$ as a function of the scaled temperature $T/T_{\mathrm{c}}({\mu }_{\mathrm{B}})$ where $T_{\mathrm{c}}({\mu }_{\mathrm{B}})$ denotes the critical temperature at finite baryon chemical potential.

The out-of equilibrium study of the QGP is performed within the Parton–Hadron–String Dynamics (PHSD) transport approach extended in the partonic sector by explicitly calculating the total and differential partonic scattering cross sections based on the DQPM and the evaluated at actual temperature T and baryon chemical potential ${\mu }_{\mathrm{B}}$ in each individual space-time cell where partonic scattering takes place. The traces of their ${\mu }_{\mathrm{B}}$ dependencies are investigated in different observables for symmetric Au + Au and asymmetric Cu + Au collisions such as rapidity and $m_{\mathrm{T}}$-distributions and directed and elliptic flow coefficients $v_1$, $v_2$ in the energy range $\sqrt{s_{\mathrm{NN}}}$ from 7.7 GeV to 200 GeV.

This is an online seminar that will be broadcasted via Jitsi.

Os seres humanos somos de natureza curiosa e máis dunha vez plantexámonos as preguntas: Por que estamos eiquí? De onde vimos? De onde ven o mundo? De que está feito? O xoves 18 de xuño ás 16:00 (hora de Madrid), o investigador do IGFAE, Elena G. Ferreiro tratará de mostrar que temos xa algunhas respostas do universo asombrosamente complexo no que vivimos.

"Universo peregrino: ciencia galega cara o mundo" é un ciclo de charlas divulgativas online organizado polo Instituto Galego de Física de Altas Enerxías (IGFAE) da Universidade de Santiago de Compostela (USC) para a comunidade galegofalante internacional. En momentos de illamento no que os peregrinos non poden vir a Santiago, a cidade Xacobea é a que reconstrúe as pontes e emprende a peregrinaxe cara ao mundo. Todos os xoves de maio e xuño de 2020, ás 16:00 (hora de Madrid), o persoal investigador do IGFAE dará unha charla sobre distintos temas de física que poden seguirse online na plataforma Microsoft Teams.

Podes seguila en directo facendo click aquí, ou acceder despois a través da canle de YouTube do IGFAE.

The analysis of jet observables is crucial to study the theory of strong interactions, QCD, in the perturbative regime. These phenomena also play an important role in constraining the background in searches for heavy particles beyond the Standard Model, a cornerstone in the physics program of the LHC. In the context of heavy-ion collisions, jet physics is immersed into the precision era to quantify the effect of the Quark Gluon Plasma on QCD dynamics. However, jet observables, both in p+p and A+A collision, are strongly affected by a wide range of processes, such A+as hadronization, underlying event or pileup, that are hard to account for in perturbation theory and conventional resummation techniques. Aiming at reducing the jet’s sensitivity to non-local and non-perturbative physics, several jet grooming techniques have been developed. In this talk, I will introduce a new set of jet substructure observables and an associated grooming technique, called dynamical grooming. It is rooted on identifying the hardest splitting in an angular ordered shower and discarding all splittings at larger angles. I will benchmark the method in QCD jets with pQCD calculations of dynamically groomed observables at modified leading-log accuracy that qualitatively agree with preliminary ALICE measurements. Next, the resilience to non-perturbative effects together with its performance on boosted W/top tagging will be assessed. Finally, a Monte-Carlo study for dynamically groomed observables in heavy-ion collisions will be presented.

This is an online seminar that will be broadcasted via Jitsi.